Mobil

About: Mobil is a based out in . It is known for research contribution in the topics: Catalysis & Zeolite. The organization has 7085 authors who have published 10642 publications receiving 237497 citations. The organization is also known as: Socony-Vacuum Oil Company & Standard Oil Company of New York.

Recent Debris-Flow Processes and Resultant Form and Facies of the Dolomite Alluvial Fan, Owens Valley, California

Abstract: A multiphase debris flow triggered by an afternoon thunderstorm was deposited 22 August 1984 on the Dolomite alluvial fan of Owens Valley, California. Two tracts 10-300 cm thick accumulated during this event, together covering 68,000 m2 (26% of the fan) with ~ 50,000 m3 of sediment. Both tracts consist of numerous paired boulder-rich levees 100-300 cm high on the proximal fan, and multiple attached lobes 20-100 cm thick on the distal fan. Each levee-lobe pathway was built by an individual surge, with flow-path switching caused by clogging of the frontal bouldery snout of the ensuing surge. The levees consist of clast-supported to matrix-supported, muddy, pebbly, cobbly, boulder gravel displaying a well-developed, radially aligned a-axis clast fabric. The lobes mostly consist of matrix-supported, muddy, pebbly cobble gravel. The clast-supported lobe margins are enriched in cobbles displaying a strongly preferred slope-parallel a-axis fabric along the sides that changes to a slope-perpendicular fabric at the snout. The distal ends of most of the clast-rich lobes are overlain and offlapped by clast-poor debris-flow lobes of granular mud 10-30 cm thick. The central zones of the levees and most lobes were surficially washed by recessional-stage water flows that moved winnowed granules, sand, and mud off the fan. The radial change from levees in the proximal fan to lobes distally is morphologically expressed as two intersecting slope segments, the upper one sloping 9-12° and the lower one 3-5°. This direct relationship between the constituent forms and slope values also is characteristic of pre-1984 deposits, suggesting that the 1984 event is typical of the primary processes constructing the Dolomite fan. The pronounced radial change from levees to lobes, and its manifestation as a slope inflection, was caused by the selective loss on the upper fan of most of the boulders from the passing debris-flow surges. Boulders were sorted from the surges because of their greater buoyancy, which caused them to be preferentially concentrated in the part of the flow that subsequently was sheared off as levees. This selective boulder removal depleted the flow of the clasts that provided lateral support, facilitating flow expansion and the onset of lobe development. Thus, the resultant facies assemblage is a function of the specific sediment grain-size suite available in the catchment colluvium, and the transport characteristics of this mix when transformed into a debris flow by the rapid addition of heavy rainfall during infrequent thunderstorms.

End clamp stops for plastic reclosable fastener

Abstract: A fastener structure for a thermoplastic bag, comprising a pair of flexible plastic strips adapted to be secured to the facing sidewalls along the mouth of a thermoplastic bag; reclosable interlocking male and female profile elements on the respective strips; and a slider straddling the strips far opening or closing the male and female profile elements. The structure also includes end clamp means locate at the opposite ends of said strips, each of said end clamp means comprising a pair of clamp members positioned, in use, on opposite sides of the bag for clamping the pair of strip and the facing sidewalk of the bag therebetween. Means is provided for clamping each of said pair of clamp members together to provide a seal at the ends of said strips, said end clamp providing a stop surface adapted to engage with the slider for preventing the slider from moving past the ends of the strips. A method of manufacturing a plurality of thermoplastic bags incorporating a fastener structure is also disclose.

Split feed reforming and n-paraffin elimination from low boiling reformate

Abstract: A processing combination is described for upgrading naphtha boiling range hydrocarbons by a combination of catalytic reforming and selective conversion of paraffinic components to enhance yield of aromatic hydrocarbons by contact with crystalline aluminosilicate catalysts having particular conversion characteristics.

Construction of the Triassic and Jurassic portion of the Phanerozoic curve of seawater 87Sr/86Sr

Abstract: The Triassic and Jurassic variation of 87Sr/86Sr in seawater is based on 128 87Sr/86Sr values obtained from samples distributed among 18 states and countries in North America, Europe, Africa and Asia. Approximately 90% of the data points are enclosed by upper and lower lines that define a band. For any given time, the correct seawater ratio probably lies within this band. A line drawn within the band represents our estimate of the actual seawater ratio as a function of time. The Triassic and Jurassic curve of seawater 87Sr/86Sr appears to be influenced by a combination of tectonic, eustatic and climatic effects. Decline in the 87Sr/86Sr of seawater for this interval corresponds with systematic rifting of Pangea and gradual submergence of continental areas. Plate interactions and seafloor spreading associated with the breakup of Pangea created new loci for hydrothermal circulation of seawater through oceanic crust, thereby increasing the exchange of low-ratio oceanic-crust Sr with higher-ratio seawater Sr. Progressive flooding of continental areas during this period and increased aridity in the Late Jurassic restricted the input of high-ratio continental Sr to the oceans. These events combined to change the relative contribution of high-ratio and low-ratio Sr entering the ocean such that the seawater curve exhibits a decline from high values in the Early Triassic to low values in the Late Jurassic. Increase in the rate of decline of the seawater curve probably corresponds with the development of the Atlantic spreading center in the Mid-Jurassic.

Production of gasoline hydrocarbons

Abstract: This specification discloses a process for the production of aromatics-rich gasoline boiling-range hydrocarbons from the lower alcohols methanol, ethanol and propanol, or their ethers. The process is carried out in two or more stages. In the first stage, an alcohol or an ether is contacted with a condensation catalyst to produce a reaction product containing aliphatic dehydration products thereof and water. In a subsequent stage, at least a portion of the product of the first reaction stage is contacted with, as a catalyst, a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least 12 and a constraint index of 1 to 12 to convert it in high yield to gasoline boiling-range hydrocarbons containing a high proportion of aromatics. In a preferred aspect a lower alcohol, suitably methanol, is dehydrated to an ether or a lower olefin or mixtures thereof, in the first stage, and this first stage product is then converted, over the referred to catalyst, to gasoline boiling-range hydrocarbons.